Kusmawati. “PENGARUH BIAYA R&D BIAYA IKLAN TERHADAP KINERJA LABA”. Jurnal Keuangan dan Bisnis 18, no. 1 (March 10, 2021): 179-190. Accessed July 1, 2025. https://journal.ukmc.ac.id/index.php/jkb/article/view/52.